Best GLP-1 Tracker App: Our Pick and Five Others Compared

What is the best GLP-1 tracker app?

PepTrac is our pick. It draws your estimated medication level as a range, with a linked source for each half-life, and it is the only one of the six whose listing states a range. It does the vial math: a 5 mg vial mixed with 2 mL of water is 2.5 mg per mL, so 0.25 mg is 0.1 mL, or 10 units on a U-100 syringe, and PepTrac converts for U-100 and U-40 syringes. That is arithmetic, not a suggested dose. Peptides beyond GLP-1 medicines sit in the same log. So do a food log with an AI meal photo scan and barcode, a workout tracker with templates, live sets and a rest timer, and an AI assistant that reads your own logs and logs a dose only after you confirm. This is PepTrac's own ranking, by the seven criteria in the table, and PepTrac is an iPhone app. The Ozempic label gives semaglutide a half-life of about 1 week.^[15]

How do we rank the six GLP-1 tracker apps?

PepTrac's ranking gives one point for each of seven criteria that an app's public listing describes: a level estimate stated as a range, a reconstitution or dose calculator, peptides beyond GLP-1 medicines, a food log, workout logging, an AI assistant and Apple Health sync. Ties go in alphabetical order. We did not use star scores, review counts, download counts or user counts, because they change daily and say little about fit. A point means the listing describes the feature, not that it works better than another app's version, and a missing point means the listing is silent on October 3, 2026, not that the app lacks it. PepTrac publishes this page and makes one of the six apps, so you should check the ranking against the linked listings in the table. The order below lists what each listing describes, and nothing else.

1. PepTrac: all seven criteria.
2. Pep AI: reconstitution calculator, peptides, food log, assistant, Apple Health sync.^[1][2]
3. PeptidePal (Blank Labs): reconstitution math, compound library, food tracker, AI advisor.^[12]
4. Glapp: dose calculators per its website, an assistant that answers questions from research, Apple Health weight sync per its website.^[9][10]
5. MeAgain: photo and barcode food log, exercise and workout logging, Apple Health sync.^[7][18]
6. Shotsy: food log with calories, protein and water, workout logging, Apple Health import.^[5]

How do the GLP-1 tracker apps compare side by side?

Two cells belong to PepTrac alone: a level estimate drawn as a range, and a workout tracker with templates, live sets and a rest timer. The other five listings describe a level estimate and none states a range. Two describe workout logging, and none describes templates or a rest timer. On vial math, three list a reconstitution calculator: PepTrac, Pep AI and PeptidePal from Blank Labs, and Glapp's website lists dose calculators.^[2][12][10] Three cover peptides beyond GLP-1 medicines: PepTrac, Pep AI and PeptidePal. Five describe a food log, and PepTrac's adds an AI meal photo scan and a barcode. Every cell in the table is linked to the listing it comes from, dated October 3, 2026, so you can open the page and check the words yourself. Where a cell says not listed, we read the App Store description and the version notes, the Google Play description and the app's website, and found nothing.

A different app from PeptidePal LLC shares the PeptidePal name and is built around clinic and provider connections. This page covers the Blank Labs LLC app only.

What is the best app to track Ozempic, Wegovy, Mounjaro or Zepbound?

PepTrac is our pick. Add semaglutide for Ozempic or Wegovy, or tirzepatide for Mounjaro or Zepbound, name the entry after your product, and log each dose you take. Between doses PepTrac draws your estimated level as a range. The Ozempic label gives semaglutide an elimination half-life of about 1 week, and the Mounjaro label gives tirzepatide about 5 days, so the curve is shaped differently for each.^[15][16] If you use a pen, you skip the vial math and simply record the dose you injected. If you draw from a vial, PepTrac converts the dose you enter into syringe units. Food and weight sit in the same app, along with a countdown to your next dose and per-compound reminders on your phone. PepTrac records what you enter and never suggests a dose, because your prescriber decides that. Weigh this as the maker's view and compare it with the table.

Which GLP-1 tracker has a reconstitution calculator?

PepTrac does, and it ties the math to your vial. It converts to U-100 and U-40 syringe units, shows how much of each vial is left, and works through the same example every time: a 5 mg vial with 2 mL of water is 2.5 mg per mL, so 0.25 mg is 0.1 mL, or 10 units. That is arithmetic, not a suggested dose. The FDA reports dosing errors with compounded semaglutide, which is a reason to keep a vial record and check every conversion against your label.^[17] Pep AI and PeptidePal from Blank Labs also list a reconstitution calculator, and Glapp's website lists dose calculators.^[1][12][10] What PepTrac adds to the calculator is the rest of the routine: the same app draws your level as a range and logs your food and workouts. If a vial calculator matters to you, we recommend PepTrac for that combination.

Which GLP-1 tracker shows medication levels as a range?

PepTrac. It draws a curve, a shaded range and a dotted projection from your schedule, and it cites a half-life source for each compound. The shaded range comes from re-running the model with the half-life and time to peak each changed by 20 percent, so it shows sensitivity to those inputs, not statistical confidence. Its numbers are relative units, not nanograms per milliliter, and no app can measure the level in your blood. The Ozempic label gives semaglutide an elimination half-life of about 1 week and the Mounjaro label gives tirzepatide about 5 days, which is what the model starts from.^[15][16] The other five listings describe a level estimate, and none states a range, which makes PepTrac the only one of the six whose listing does. Whichever app you use, read a level chart as a trend to discuss with your prescriber, not as a lab result.

Which GLP-1 tracker apps are free to download?

All six are free to download. PepTrac is free to download, with an optional Pro subscription whose price is shown in the app before you subscribe. Pep AI's listing says a paid subscription is required to access its tracking features, with in-app purchases from $3.99 to $49.99.^[1] PeptidePal from Blank Labs says protocol tracking, the full library, advanced analytics and AI chat require a subscription.^[12] MeAgain says some features require a subscription.^[7] Glapp lists a Glapp Max plan at $4.99 weekly, $9.99 monthly or $39.99 annually on the US App Store.^[9] Shotsy lists in-app purchases.^[5] These are the US App Store listings as of October 3, 2026, and prices and plans change. Open each listing and its in-app purchase list before you subscribe, and check which features you need before you pay for any of them.

What does PepTrac not do?

PepTrac is an iPhone app. There is no Android version and no Apple Watch app, and it has no dedicated side-effect log. The table's Platforms column lists where each of the other apps runs, with a link to the listing each cell comes from. On iPhone, PepTrac does something else instead: it syncs steps and calories burned with Apple Health, keeps your doses, sites, weight, food and workouts in one place, and draws the level estimate as a range rather than a single line. If you use Android or want a wrist app, check the Platforms column first, because that is a real constraint and no feature list changes it. Use this page to pick the app that fits the rest of your routine. We make PepTrac, so weigh these limits with the table. Ask your prescriber about side effects.